drm/exynos: added a feature to get gem buffer information.

this patch adds a feature to get a gem buffer information and user application
can get the gem buffer information simply in runtime through gem handle.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index f58a487e4425919336d6f5a43ed44a76bb492ffd..b7a2869582f2a2b14a2a0eed1bd974613912555c 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -211,6 +211,8 @@ static struct drm_ioctl_desc exynos_ioctls[] = {
                        DRM_AUTH),
        DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
                        exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
+       DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET,
+                       exynos_drm_gem_get_ioctl, DRM_UNLOCKED),
        DRM_IOCTL_DEF_DRV(EXYNOS_PLANE_SET_ZPOS, exynos_plane_set_zpos_ioctl,
                        DRM_UNLOCKED | DRM_AUTH),
        DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 31bb85f5d2741ba0c21812adee6f0dae8a79042b..fc91293c456041ff995c4eb2eda340df7e39a2f5 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -604,6 +604,32 @@ int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
        return 0;
 }
 
+int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
+                                     struct drm_file *file_priv)
+{      struct exynos_drm_gem_obj *exynos_gem_obj;
+       struct drm_exynos_gem_info *args = data;
+       struct drm_gem_object *obj;
+
+       mutex_lock(&dev->struct_mutex);
+
+       obj = drm_gem_object_lookup(dev, file_priv, args->handle);
+       if (!obj) {
+               DRM_ERROR("failed to lookup gem object.\n");
+               mutex_unlock(&dev->struct_mutex);
+               return -EINVAL;
+       }
+
+       exynos_gem_obj = to_exynos_gem_obj(obj);
+
+       args->flags = exynos_gem_obj->flags;
+       args->size = exynos_gem_obj->size;
+
+       drm_gem_object_unreference(obj);
+       mutex_unlock(&dev->struct_mutex);
+
+       return 0;
+}
+
 int exynos_drm_gem_init_object(struct drm_gem_object *obj)
 {
        DRM_DEBUG_KMS("%s\n", __FILE__);

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h
index efc82527b27246341f6166498e8d41c72912d877..14d038b6cb02ffe6c35e3350d612018a3fe9f241 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h
@@ -127,6 +127,10 @@ int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
 int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
 
+/* get buffer information to memory region allocated by gem. */
+int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
+                                     struct drm_file *file_priv);
+
 /* initialize gem object. */
 int exynos_drm_gem_init_object(struct drm_gem_object *obj);
 

diff --git a/include/drm/exynos_drm.h b/include/drm/exynos_drm.h
index 2d6eb06637bf30ccf2057c0d1e51294dcd57e9d8..70c0f7e7db828afe83875d3c1bbf4e0d8ecf9428 100644 (file)
--- a/include/drm/exynos_drm.h
+++ b/include/drm/exynos_drm.h
@@ -74,6 +74,21 @@ struct drm_exynos_gem_mmap {
        uint64_t mapped;
 };
 
+/**
+ * A structure to gem information.
+ *
+ * @handle: a handle to gem object created.
+ * @flags: flag value including memory type and cache attribute and
+ *     this value would be set by driver.
+ * @size: size to memory region allocated by gem and this size would
+ *     be set by driver.
+ */
+struct drm_exynos_gem_info {
+       unsigned int handle;
+       unsigned int flags;
+       uint64_t size;
+};
+
 /**
  * A structure for user connection request of virtual display.
  *
@@ -113,6 +128,7 @@ enum e_drm_exynos_gem_mem_type {
 #define DRM_EXYNOS_GEM_MAP_OFFSET      0x01
 #define DRM_EXYNOS_GEM_MMAP            0x02
 /* Reserved 0x03 ~ 0x05 for exynos specific gem ioctl */
+#define DRM_EXYNOS_GEM_GET             0x04
 #define DRM_EXYNOS_PLANE_SET_ZPOS      0x06
 #define DRM_EXYNOS_VIDI_CONNECTION     0x07
 
@@ -125,6 +141,9 @@ enum e_drm_exynos_gem_mem_type {
 #define DRM_IOCTL_EXYNOS_GEM_MMAP      DRM_IOWR(DRM_COMMAND_BASE + \
                DRM_EXYNOS_GEM_MMAP, struct drm_exynos_gem_mmap)
 
+#define DRM_IOCTL_EXYNOS_GEM_GET       DRM_IOWR(DRM_COMMAND_BASE + \
+               DRM_EXYNOS_GEM_GET,     struct drm_exynos_gem_info)
+
 #define DRM_IOCTL_EXYNOS_PLANE_SET_ZPOS        DRM_IOWR(DRM_COMMAND_BASE + \
                DRM_EXYNOS_PLANE_SET_ZPOS, struct drm_exynos_plane_set_zpos)